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Audio Hum Removal

Remove electrical hum (50/60Hz and harmonics) from audio

Uses multiple notch filters to target electrical hum at 50Hz/60Hz and their harmonics. Useful for cleaning recordings with power line interference.

Click to upload file or drag and drop file here

Maximum file size: 200MB Supported formats: audio/*

Remove harmonic frequencies (2x, 3x... up to 2kHz)

Width of frequency cut. Lower (1-5Hz) is better for preserving audio.

How much to reduce the target frequencies. More negative = stronger reduction.

Key Facts

Category
Media
Input Types
file, select, number, checkbox
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

The Audio Hum Removal tool eliminates unwanted electrical hum from audio recordings. It uses notch filters to target 50Hz/60Hz power line interference and their harmonics, delivering clean audio output for professional or personal use.

When to Use

  • •When recording audio in environments with electrical noise, such as near power lines or faulty equipment.
  • •When post-processing interviews, podcasts, or voiceovers that have background hum from microphones or cables.
  • •When restoring old recordings or field audio that suffer from persistent 50Hz/60Hz interference.

How It Works

  • •Upload your audio file in a supported format like MP3, WAV, or AAC.
  • •Select the hum type preset (60Hz for Americas/Japan, 50Hz for Europe/Asia/Africa) or enter a custom frequency.
  • •Adjust settings including harmonics removal, filter width, and reduction depth to fine-tune the process.
  • •Download the cleaned audio in your chosen output format, such as MP3 or FLAC.

Use Cases

Cleaning up podcast or interview recordings with microphone or interface hum.
Enhancing field recordings by removing environmental electrical noise from equipment.
Restoring vintage audio tapes, vinyl transfers, or old digital files with power line interference.

Examples

1. Podcast Interview Cleanup

Podcaster
Background
A podcaster recorded an interview in a home studio, but the audio interface introduced a constant buzzing sound.
Problem
The recording has a distracting 60Hz hum that lowers audio clarity and professionalism.
How to Use
Upload the interview audio file, select the 60Hz preset, enable harmonics removal, and set a filter width of 2Hz to preserve voice quality.
Outcome
The hum is removed, resulting in a clean audio file ready for editing and publishing.

2. Field Recording Restoration

Sound Designer
Background
A sound designer captured ambient nature sounds outdoors, but nearby electrical equipment caused interference.
Problem
The audio has a 50Hz hum with harmonics, distorting the natural soundscape.
How to Use
Use the custom frequency option to target 50Hz, adjust reduction depth to -40dB for stronger removal, and export as WAV for high fidelity.
Outcome
The electrical interference is eliminated, preserving the original ambient sounds for use in projects.

Try with Samples

audio, video, file
Copyright-Free AAC Audio Samples
High-quality AAC encoded audio samples for testing and development, featuring nature sounds and meditation music with excellent compression
title token audio
audio
Copyright-Free MP3 Audio Samples
Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
title token audio
audio
Copyright-Free WAV Audio Samples
Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
title token audio
audio
Copyright-Free OGG Vorbis Audio Samples
Open-source OGG Vorbis audio samples for testing and development, featuring excellent compression with nature sounds and meditation music
title token audio
audio

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FAQ

What audio file formats can I upload?

The tool accepts common audio formats including MP3, WAV, AAC, M4A, OGG, Opus, and FLAC.

How do I choose between 50Hz and 60Hz presets?

Select based on your region's power line frequency: 60Hz for the Americas and Japan, 50Hz for Europe, Asia, and Africa.

What does the 'Include Harmonics' option do?

It removes higher frequency multiples of the base hum, such as 120Hz or 180Hz for 60Hz hum, for more thorough cleaning.

Can I process multiple audio files at once?

No, the tool processes one file at a time to ensure precise control over hum removal settings.

Will removing hum affect the original audio quality?

With careful settings like a narrow filter width (1-5Hz), it minimizes impact on desired audio while effectively reducing hum.

API Documentation

Request Endpoint

POST /en/api/tools/audio-hum-removal

Request Parameters

Parameter Name Type Required Description
audioFile file (Upload required) Yes -
preset select No -
customFrequency number No -
includeHarmonics checkbox No Remove harmonic frequencies (2x, 3x... up to 2kHz)
widthHz number No Width of frequency cut. Lower (1-5Hz) is better for preserving audio.
depthDb number No How much to reduce the target frequencies. More negative = stronger reduction.
outputFormat select No -

File type parameters need to be uploaded first via POST /upload/audio-hum-removal to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-audio-hum-removal": {
      "name": "audio-hum-removal",
      "description": "Remove electrical hum (50/60Hz and harmonics) from audio",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-hum-removal",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]